Moog RKP 19 Piston Pump | D951-2079 /A HP-R18A1-RKP019SM28F2Z00 | High Pressure

The RKP Series radial piston pumps from Chengyuan Hydraulic are heavy-duty power components fully compatible with Moog industrial standards. Specifically, the D951-2079 /A model is based on the advanced RKP-II design, renowned for its robustness and minimal pressure pulsations. By optimizing the radial piston arrangement and sliding surfaces, this pump delivers a continuous 280 bar pressure with exceptional quietness. Every unit from Chengyuan undergoes 100% simulated full-load testing to verify displacement response and volumetric efficiency, ensuring 100% original-place interchangeability with the OEM Moog pump.

Technical Specifications :

• Model Number: D951-2079 /A (HP-R18A1-RKP019SM28F2Z00)

• Displacement: $19\text{ cm}^3/\text{rev}$

• Nominal Pressure: $280\text{ bar (28 MPa)}$

• Maximum Peak Pressure: $350\text{ bar (35 MPa)}$

• Maximum Speed: $2500\text{ rpm}$

• Minimum Speed: $600\text{ rpm}$

• Input Power (@ 1500 rpm, 280 bar): Approx. $8.5\text{ kW}$

• Rotation: R (Right-hand/Clockwise)

• Housing Material: High-strength Ductile Iron

• Weight: Approx. $25\text{ kg}$

Key Technical Advantages:

• Patented Quiet RKP Design: Optimized piston count and flow channel geometry significantly reduce fluid pressure ripples. The operating noise is 3-5 dB lower than conventional piston pumps, greatly enhancing the workplace environment.

• Superior Contamination Resistance: The RKP structure features large sliding contact areas with specialized surface hardening. Compared to axial piston pumps, it is far less sensitive to fine particles in the fluid, resulting in longer maintenance-free intervals.

• Excellent Suction Performance: The radial arrangement relies on centrifugal force and mechanical return for priming. This provides strong self-suction capability, preventing cavitation even during cold starts or with high-viscosity fluids.

• Heavy-Duty Bearing Support: Equipped with large-sized tapered roller bearings to support the drive shaft. This construction allows for significant radial loads at the shaft end and ensures high mechanical precision during 24/7 operation.

Application Areas:

• Injection Molding: High-pressure power source for servo-driven injection machines.

• Die Casting: Systems requiring high pressure stability and rapid pressure switching response.

• Test Rigs: Precision hydraulic loading tests for aerospace and automotive components.

Expert Maintenance Tips:

• Pre-Priming: Before the initial startup, the pump case must be filled with clean hydraulic oil through the highest drain port. Manually rotate the shaft to ensure all sliding surfaces are lubricated.

• Case Drain Pressure: The drain line must lead directly to the tank. Backpressure must not exceed 0.5 bar to avoid shaft seal damage.

• Viscosity Management: Maintain working viscosity between $20\text{–}100\text{ mm}^2/\text{s}$. If oil temperature causes viscosity to drop below $10\text{ mm}^2/\text{s}$, volumetric efficiency will decline sharply.